CN113540704B - Battery modules and electrical equipment - Google Patents

Abstract

The utility model provides a battery module, including a plurality of electric cores and support, a plurality of electric cores are piled up along first direction and are set up, every electric core includes the first terminal and the second terminal that polarity is opposite, the support includes the through-hole of multiunit, the through-hole of every group includes first terminal through-hole and second terminal through-hole, the first terminal and the second terminal of same electric core pass the first terminal through-hole of same group respectively and the second terminal through-hole, the through-hole of multiunit includes first group through-hole, the second through-hole and be located the first group through-hole and the third group through-hole between the second through-hole, along the first direction, distance D1 between the first terminal through-hole of first group through-hole and the second terminal through-hole of its adjacent third group through-hole is greater than distance D3 between the adjacent third group through-hole. The battery module and the consumer of this application increase the first terminal through-hole of first group through-hole and the second terminal through-hole of its adjacent third group through-hole between the distance, reduce first terminal and second terminal because of the too little risk of short circuit that takes place of interval.

Description

Battery modules and electrical equipment

technical field

The present application relates to the technical field of cell stacking, and in particular to a battery module and electrical equipment.

Background technique

At present, when many batteries on the market are stacked, if the distance between the tabs of two adjacent batteries is too close, the risk of short circuit is likely to occur, and there is a certain safety risk.

Contents of the invention

In view of the above situation, it is necessary to provide a battery module and electrical equipment to reduce the risk of short circuit of the battery cells.

An embodiment of the present application provides a battery module, including a plurality of battery cells and a bracket. Multiple electric cores are stacked along the first direction. Each cell includes a first terminal and a second terminal, and the first terminal and the second terminal have opposite polarities. The bracket includes multiple groups of through holes, and each group of through holes includes a first terminal through hole and a second terminal through hole. The first terminal and the second terminal of the same electric core respectively pass through the same group of first terminal through holes and second terminal through holes. The plurality of sets of vias includes a first set of vias, a second set of vias, and a third set of vias located between the first set of vias and the second set of vias. Wherein, along the first direction, the distance D1 between the first terminal through hole of the first group of through holes and the second terminal through hole of the third group of adjacent through holes is greater than that between the adjacent third group of through holes The distance D3.

Further, increasing the distance between the first terminal in the first terminal through hole of the first group of through holes and the second terminal in the second terminal through hole of the adjacent third group of through holes can reduce the distance between the first terminal The risk of short-circuiting with the second terminal, and increasing the connectable area, facilitates the installation of the first connecting piece, and further reduces the risk of short-circuiting between the first connecting piece and the second terminal in the adjacent third group of through holes risk.

Among the two adjacent third group of through holes, the distance between the first terminal through hole of one group of third group of through holes and the second terminal through hole of another group of third group of through holes is D3, and one of the third group of through holes The first terminal through holes of the third group of through holes and the second terminal through holes of another group of third group of through holes are oppositely arranged along the first direction.

In some embodiments of the present application, the difference between D1 and D3 is greater than 6mm.

The above embodiments are beneficial to increase the connection area between the first connecting piece and the first terminal, and strengthen the welding area between the first connecting piece and the first terminal.

In some embodiments of the present application, the distance between the second terminal through hole of the second group of through holes and the first terminal through hole of the adjacent third group of through holes is D2, wherein D2 is smaller than D3.

The above-mentioned embodiment can reduce the distance between the second group of through holes and the adjacent third group of through holes, and adjust the first terminal through hole of the first group of through holes to the second group of through holes along the first direction X distance.

In some embodiments of the present application, along the first direction, the distance d1 between the through hole of the first terminal of the first group of through holes and the through hole of the second terminal of the second group of through holes is equal to the second terminal of the first group of through holes The distance d2 from the through hole to the first terminal through hole of the second set of through holes.

The above-mentioned embodiment is beneficial to make the length of the first terminal extending out of the cell case consistent with the cutting of the second terminal extending out of the cell case, which is convenient for production.

In some embodiments of the present application, the bracket further includes a base plate and multiple sets of protrusions arranged at intervals, the base plate includes a first side and a second side oppositely disposed along the second direction, and the multiple sets of protrusions are located on the first side of the base plate. Viewed along the second direction, the plurality of sets of protrusions includes a first set of protrusions located between the first set of through holes and a third set of adjacent through holes, a second set of through holes located between the second set of through holes and a third set of adjacent through holes. The second group of protrusions between the through holes and the third group of protrusions located between the first group of protrusions and the second group of protrusions, the first group of protrusions including the first terminal through hole and the second group of protrusions adjacent to it A first portion between the second terminal through holes of the three groups of through holes, and a second portion between the second terminal through holes and the first terminal through holes of the third group of through holes adjacent thereto. Along the second direction, the projection of the first part on the substrate has a width along the first direction of W1, and the projection of the second part on the substrate has a width of W2 along the first direction, and W1 is larger than W2.

The above-mentioned embodiment is beneficial for the first terminal of the first part to be far away from the second terminal in the adjacent third group of through holes along the first direction X, increasing the distance between the first terminal and the second terminal, and reducing the distance between the first terminal and the second terminal. Risk of short circuit at the second terminal.

In some embodiments of the present application, along the first direction, the distance from the first portion to the second set of protrusions is equal to the distance from the second portion to the second set of protrusions.

In some embodiments of the present application, each group of protrusions gradually becomes smaller along a direction opposite to the second direction.

The above-mentioned embodiment guides the movement of the first terminal and the second terminal, and guides the first terminal and the second terminal to move close to the substrate.

In some embodiments of the present application, viewed along the second direction, the second group of protrusions includes a second terminal through hole located between the second terminal through hole of the second group of through holes and the first terminal through hole of the adjacent third group of through holes. and a fourth portion located between the first terminal through hole of the second group of through holes and the second terminal through hole of its adjacent third group of through holes. Along the second direction, the width of the projection of the third part on the substrate along the first direction is W3, the width of the projection of the fourth part on the substrate along the first direction is W4, and W3 is smaller than W4.

In the above-mentioned embodiment, during the assembly process, it is beneficial to guide the second terminal located in the second terminal through-hole of the second group of through-holes to be disposed close to the adjacent third group of through-holes, and at the same time, the first through-hole of the second group of through-holes The distance between a terminal through hole and the adjacent third group of through holes is equal to D3.

In some embodiments of the present application, along the first direction, the substrate includes a second side and a first side, the distance from the second terminal through hole of the second group of through holes to the first side is d21, and the second group of through holes The distance from the through hole of the first terminal of the through hole to the first side is d22, and d21 is greater than d22.

The above-mentioned embodiment can be used to increase the distance between the second terminal through hole of the second group of through holes and the side of the substrate, so as to facilitate group welding of the second terminal connecting portion and the second connecting member.

In some embodiments of the present application, along the first direction, the substrate includes a second side and a first side, and the side of the first terminal through hole of the first group of through holes away from the second group of through holes runs through the second side side.

The above-mentioned embodiment is convenient to fold the first terminal connecting part disposed in the first terminal through hole of the first group of through holes outwards and weld with the first connecting member.

In some embodiments of the present application, the bracket includes a third side and a fourth side oppositely disposed along the third direction, the bracket includes an opening disposed on the third side, and multiple sets of gaps are formed between multiple sets of protrusions. In three directions, the opening communicates with multiple sets of gaps.

In some embodiments of the present application, first slopes and second slopes are provided at the ends of multiple groups of protrusions on the third side, and along the third direction, the first slopes and second slopes of the same group of protrusions are along the first slope. The distance between the directions gradually increases from the third side to the fourth side.

The above-mentioned embodiment facilitates guiding the first terminal and the second terminal into the gap between two adjacent sets of protrusions, and improves the success rate of docking between the battery cell and the bracket.

In some embodiments of the present application, the battery cell further includes a cell case and an electrode assembly, the cell case includes a housing portion and an edge sealing portion extending outward from the housing portion, and the housing portion includes a On the first surface and the second surface, the first terminal and the second terminal protrude from the edge sealing part to the cell casing. The electrode assembly is accommodated in the accommodating portion, and the first terminal and the second terminal are electrically connected to the electrode assembly.

In some embodiments of the present application, the edge sealing part is arranged between the plane where the first surface is located and the plane where the second surface is located, and the edge sealing part is closer to the first surface.

In some embodiments of the present application, the battery case includes a first area and a second area, the first area 21a is provided with a first space, the electrode assembly is arranged in the first space, the second area has a planar structure, and the first area It is connected with the second area, the side of the first area is connected with the side of the second area to form a plurality of sealing parts, and the first terminal and the second terminal extend out of the battery case from one of the sealing parts.

In some embodiments of the present application, the first surface is disposed in the second region, and the second surface is disposed in the first region.

In some embodiments of the present application, the two first faces or the two second faces of any two adjacent battery cells are arranged opposite to each other.

In some embodiments of the present application, the first terminals between at least two adjacent cells are connected to the second terminals, or the first terminals between adjacent cells are connected to the first terminals.

In some embodiments of the present application, the interconnected first terminal and the second terminal are respectively bent and connected together, the first terminal includes a first terminal connecting portion passing through the through hole of the first terminal, and the second terminal It includes a second terminal connection part passing through the second terminal through hole. The battery module also includes a plurality of conductive parts, the plurality of conductive parts are arranged on the side of the substrate away from the convex part, the first terminal connection part, the second terminal connection part and the conductive part are connected, and the bracket also includes a The partition part is arranged between the first terminal through hole and the second terminal through hole of the same group of through holes.

The partition part of the above-mentioned embodiment can reduce the probability of other foreign matter falling between the first terminal through hole and the second terminal through hole of the same group, thereby reducing the risk of a short circuit between the first terminal and the second terminal due to the foreign matter, Optional, and the partition can also enhance the structural strength of the bracket.

In some embodiments of the present application, the battery module further includes a sampling element, the sampling element is disposed on a side of the substrate away from the protrusion and connected to the conductive element.

In some embodiments of the present application, the battery module further includes a first connector and a second connector, one end of the first connector is connected to the first terminal passing through the first terminal through hole of the first group of through holes, The other end of the first connector has a first connection portion, one end of the second connector is connected to the second terminal passing through the second terminal through hole of the second group of through holes, and the other end of the second connector has a second connection part, the first connecting part and the second connecting part are located on the same side of the substrate.

The above-mentioned embodiments facilitate the connection of external devices and improve space utilization.

In some embodiments of the present application, the bracket further includes a first insulating column, one end of the first insulating column is connected to the substrate, and the other end is abutted against the first connecting member.

The first insulating column in the above-mentioned embodiment can better support the first connector, and reduce the possibility of a short circuit occurring when the first connector contacts the bent first terminal and the second terminal.

In some embodiments of the present application, the bracket further includes an insulating block, the insulating block is disposed on the second side of the substrate, and is located between the first terminal through hole of the first group of through holes and the adjacent third group of through holes, Along the third direction, the length of the insulating block is greater than the length of the first terminal through hole of the first group of through holes.

The insulating block of the above-mentioned embodiment is used to block the first connecting piece and contact the first terminal welded on the first connecting piece with the adjacent second terminal, so as to reduce the contact between the first connecting piece and the second through hole in the third group of through holes. Risk of short circuit at the terminals.

An embodiment of the present application also provides an electric device, including the above-mentioned battery module.

The above-mentioned battery module and electrical equipment increase the distance between the first terminal through hole of the first group of through holes and the second terminal through hole of the adjacent third group of through holes, thereby increasing the distance between the first terminal and the second terminal through hole. The distance between the terminals reduces the risk of a short circuit between the first terminal and the second terminal due to too small a distance, and increases the connectable area, which is convenient for arranging the first connecting member. Further, the risk of short circuit between the first connecting member and the second terminals in the adjacent third group of through holes can be reduced.

Description of drawings

FIG. 1 is a schematic diagram of an exploded state of a battery module in an embodiment of the present application.

Fig. 2 is a first view of a cell connected to a bracket in an embodiment of the present application.

Fig. 3 is a first view of a battery cell in an embodiment of the present application.

Fig. 4 is a second view of the battery cell in an embodiment of the present application.

Fig. 5 is a schematic diagram of an exploded state of the cell before packaging in one embodiment of the present application.

Fig. 6 is a first view of a bracket in one embodiment of the present application.

Fig. 7 is a second view of a bracket in one embodiment of the present application.

FIG. 8 is a schematic structural view of the tabs not yet bent after the battery core is inserted into the through part according to an embodiment of the present application.

FIG. 9 is a schematic structural diagram of stacked cells in an embodiment of the present application.

Fig. 10 is a schematic structural diagram of tabs bent after the cells are stacked together in an embodiment of the present application.

Fig. 11 is a schematic diagram of the structure of the sampling element and the conductive element installed on the bracket in an embodiment of the present application.

Fig. 12 is a second view of the battery cell connected to the bracket in an embodiment of the present application.

Fig. 13 is a schematic diagram of the structure of the second connecting member connected to the bracket in an embodiment of the present application.

Fig. 14 is a schematic diagram of the structure of the first connector and the second connector connected to the bracket in an embodiment of the present application.

Fig. 15 is a schematic structural diagram of an electrical device in an embodiment of the present application.

Fig. 16 is a structural schematic diagram of the distance between the first group of through holes and the adjacent third group of through holes in one embodiment of the present application.

Fig. 17 is a structural schematic diagram of the distance between two adjacent through holes of the third group in an embodiment of the present application.

Fig. 18 is a schematic diagram of the distance structure between the first group of through holes and the second group of through holes in an embodiment of the present application.

Explanation of main component symbols

Battery Module 100

stand 1

Substrate 11

First side 11A

Second side 11B

first side 11a

Second side 11b

Third side 11c

Fourth side 11d

opening 11e

Through hole 111

First set of through holes 111a

Second set of through holes 111b

The third set of through holes 111c

First terminal through hole 1111

Second terminal through hole 1112

Convex 12

First bevel 12a

Second bevel 12b

First set of protrusions 121

Part I 121a

Part II 121b

Second set of protrusions 122

Part III 122a

Part IV 122b

Part V 121c

Third set of protrusions 123

Fourth set of protrusions 124

The fifth set of convex parts 125

Divider 13

First insulating post 14

Second insulating column 15

Insulation block 16

Cell 2

Cell housing 21

First zone 21a

Second area 21b

First Space 211a

Housing 211

First side 2111

Second side 2112

Edge banding 212

Electrode assembly 22

first terminal 23

Second terminal 24

shell 3

first case 31

Second housing 32

The third through hole 321

Fourth through hole 322

Fifth through hole 323

Conductor 4

Sample piece 5

first connector 61

First connection part 611

Second connector 62

Second connection part 621

first filler 71

Second filler 72

The first cell 81

Second cell 82

First Direction X

Second direction Y

Third direction Z

The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings.

Detailed ways

The following will describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of them.

It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intervening element at the same time. When an element is referred to as being "disposed on" another element, it can be directly disposed on the other element or intervening elements may also be present.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the application are only for the purpose of describing specific embodiments, and are not intended to limit the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It can be understood that when two components are arranged in parallel/perpendicularly in the same direction, there may be a certain angle between the two components, and there is a tolerance of 0-±5% between the two components, and the two components are greater than, equal to or less than the allowable There is a tolerance of 0-±5%.

The embodiments of the present application will be further described in conjunction with the accompanying drawings.

As shown in FIG. 1 and FIG. 2 , an embodiment of the present application provides a battery module 100 , including a casing 3 , a bracket 1 and a plurality of battery cells 2 . The shell 3 includes a first shell 31 and a second shell 32, and the first shell 31 and the second shell 32 form a cavity space. A plurality of battery cells 2 are stacked in sequence along the first direction X, and the plurality of battery cells 2 are connected to the bracket 1 and accommodated in the cavity space.

As shown in Fig. 3, Fig. 4 and Fig. 5, the battery cell 2 includes a cell casing 21, an electrode assembly 22, a first terminal 23 and a second terminal 24, and the electrode assembly 22 is accommodated inside the cell casing 21, the first The terminal 23 and the second terminal 24 are connected to the electrode assembly 22 and protrude from the battery case 21 . The electrode assembly 22 includes a wound structure formed by winding a positive electrode sheet, a negative electrode sheet, and a separator. Further, the battery case 21 includes a receiving portion 211 and an edge sealing portion 212 connected to each other. The edge sealing portion 212 is located at the edge of the receiving portion 211 and extends outward from the receiving portion 211. The electrode assembly 22 is accommodated in the receiving portion 211. The second A terminal 23 and a second terminal 24 protrude from the sealing portion 212 . Take the extension direction of the side of the cell 2 connected to the bracket 1 as the third direction Z, wherein the first terminal 23 and the second terminal 24 of at least one cell 2 are sequentially arranged at intervals along the third direction Z.

In some embodiments, the battery case 21 includes a first area 21a and a second area 21b, the first area 21a is provided with a first space 211a, the electrode assembly 22 is disposed in the first space 211a, and the second area 21b is roughly a flat plate structure, the first region 21a is connected to the second region 21b, the side of the first region 21a is connected to the side of the second region 21b to form a plurality of sealing parts 212, and the first terminal 23 and the second terminal 24 are sealed from one of them. The side portion 212 extends out of the battery case 21 .

The first terminal 23 and the second terminal 24 have opposite polarities, one of the first terminal 23 and the second terminal 24 is a positive terminal, and the other is a negative terminal. In some embodiments, the battery case 21 includes an aluminum-plastic film. In this embodiment, the second terminal 24 is used as a positive terminal, and the first terminal 23 is described as a negative terminal.

3 and 4, along the first direction X, the housing portion 211 includes a first face 2111 and a second face 2112 opposite to each other, and the first face 2111 and the second face 2112 are two opposite outer surfaces of the housing portion 211 . Optionally, the first surface 2111 is disposed in the second region 21b, and the second surface 2112 is disposed in the first region 21a.

Further, the edge sealing portion 212 is located between the plane where the first surface 2111 is located and the plane where the second surface 2112 is located. In some embodiments, the distance between the edge sealing portion 212 and the plane where the first surface 2111 is located is smaller than the distance between the edge sealing portion 212 and the plane where the second surface 2112 is located, that is, the edge sealing portion 212 is closer to the first surface Face 2111.

In some embodiments, along the first direction X, the two first faces 2111 or the two second faces 2112 of any two adjacent receiving parts 211 are opposite to each other.

Referring to FIG. 9 , in one embodiment, the battery cells 2 stacked along the first direction X are stacked and arranged sequentially in the order that the two second faces 2112 are arranged opposite to each other and the two first faces 2111 are arranged opposite to each other.

In some embodiments, along the first direction X, the first terminal 23 of any cell 2 is electrically connected to the second terminal 24 of another cell 2 opposite to the first surface 2111 of the cell 2 .

In some embodiments, along the first direction X, the second terminal 24 of any cell 2 is electrically connected to the first terminal 23 of the cell 2 opposite to the second surface 2112 of the cell 2 .

In some embodiments, along the first direction X, the first terminal 23 of the cell 2 can also be connected to the first terminal 23 of another cell 2 adjacent thereto.

2 and 9, in some embodiments, along the first direction X, the first terminal 23 of one of the outermost cells 2 is also connected to the first connector 61, and the other one of the outermost The second terminal 24 of the battery cell 2 is also connected to the second connecting piece 62 , and the first connecting piece 61 and the second connecting piece 62 are used for connecting external devices. The battery cell 2 includes a plurality of battery cells 2 located between the two outermost battery cells 2, wherein the first terminal 23 of one battery cell 2 is electrically connected to another battery cell opposite to the first surface 2111 of the battery cell 2 2 second terminals 24, one of the second terminals 24 is electrically connected to the first terminal 23 of the battery cell 2 opposite to the second surface 2112 of the battery cell 2.

As shown in FIG. 6 , FIG. 7 and FIG. 8 , the bracket 1 includes a base plate 11 and a plurality of sets of protrusions 12 arranged at intervals. The substrate 11 is generally in the form of a plate-like structure arranged flat on the plane where the first direction X and the third direction Z lie. Wherein, the third direction Z is perpendicular to the first direction X. The substrate 11 includes a first side 11 a and a second side 11 b oppositely disposed along the second direction Y, and a plurality of sets of protrusions 12 arranged at intervals are disposed on the first side 11 a of the substrate 11 . The second direction Y is perpendicular to the plane where the first direction X and the third direction Z lie.

Please refer to FIG. 6 and FIG. 11 , the substrate 11 is provided with a plurality of sets of through holes 111 aligned along the first direction X, and the through holes 111 penetrate the substrate 11 along the second direction Y. At least part of the through holes 111 are in the form of long holes extending along the third direction Z on the substrate 11 , and the length of the through holes 111 along the first direction X is smaller than the length of the through holes 111 along the third direction Z. The partial through hole 111 includes a first terminal through hole 1111 and a second terminal through hole 1112 arranged in sequence along the third direction Z, and the partial through hole 111 includes a first terminal through hole 1111 arranged in sequence along the direction opposite to the third direction Z. and the second terminal through hole 1112 . The first terminal 23 and the second terminal 24 of the same cell 2 respectively pass through the first terminal through hole 1111 and the second terminal through hole 1112 in the same group.

Referring to FIG. 10 , in one embodiment, the first terminal 23 includes a first terminal connecting portion 231 passing through the first terminal through hole 1111 , and the second terminal 24 includes a second terminal connecting portion 231 passing through the second terminal through hole 1112 . terminal connection part 241 . The first terminal connection portion 231 and the second terminal connection portion 241 are located on the second side 11 b of the substrate 11 .

Please refer to FIG. 11 and FIG. 14 , in some embodiments, the plurality of groups of through holes 111 include a first group of through holes 111a arranged along the first direction X, a second group of through holes 111b and a group of through holes 111b located between the first group of through holes 111a and The third set of vias 111c between the second set of vias 111b. Wherein the third group of through holes 111c is at least two groups.

In one embodiment, the first terminal 23 passes through the first terminal through hole 1111 of the first group of through holes 111a, the first terminal connecting portion 231 of the first terminal 23 is connected to the first connecting member 61, and the second terminal 24 passes through The second terminal connecting portion 241 of the second terminal 24 is connected to the second connecting member 62 through the second terminal through hole 1112 of the second group of through holes 111 b.

Along the first direction X, the distance between the first terminal through hole 1111 of the first group of through holes 111a and the second terminal through hole 1112 of the adjacent third group of through holes 111c is D1, and the adjacent two third In the group of through holes 111c, one group of second terminal through holes 1112 and the other group of first terminal through holes 1111 are arranged opposite to each other along the first direction X, the distance between them is D3, and D1 is greater than D3, The distance between the first terminal 23 in the first terminal through hole 1111 of the first group of through holes 111a and the second terminal 24 in the second terminal through hole 1112 of the adjacent third group of through holes 111c can be increased, reducing The risk of short circuit between the first terminal 23 and the second terminal 24 increases, and the connectable area is increased, which is convenient for setting the first connecting member 61 . Further, the risk of a short circuit between the first connecting member 61 and the second terminals 24 in the adjacent third group of through holes 111c can be reduced.

16 and 17, in one embodiment, along the first direction X, the first terminal through holes 1111 of the first group of through holes 111a are connected to the first terminal through holes 1111 of the adjacent third group of through holes 111c. The distance between them is D1. Along the first direction X, among the two adjacent third groups of through holes 111c, one group of first terminal through holes 1111 and the other group of first terminal through holes 1111 are arranged opposite to each other along the first direction X, both The distance between them is D3.

In one embodiment, the difference between D1 and D3 is greater than 6 mm, which is beneficial to increase the connection area between the first connecting member 61 and the first terminal 23 and strengthen the welding area between the first connecting member 61 and the first terminal 23 .

In one embodiment, the substrate 11 includes a first side 11A and a second side 11B, along the first direction X, the first terminal through hole 1111 of the first group of through holes 111a is away from the side of the second group of through holes 111b Through the second side 11B of the substrate 11 , the first terminal connecting portion 231 disposed in the first terminal through hole 1111 of the first group of through holes 111 a is conveniently folded outward and welded with the first connecting member 61 .

The distance between the second terminal through hole 1112 of the second group of through holes 111b and the first terminal through hole 1111 of the adjacent third group of through holes 111c is D2, and D2 is smaller than D3, which can reduce the size of the second group of through holes 111b. The distance between the adjacent third group of through holes 111c is adjusted from the first terminal through hole 1111 of the first group of through holes 111a to the second group of through holes 111b.

In one embodiment, the substrate 11 includes a first side 11A and a second side 11B. Along the first direction X, the second terminal through hole 1112 of the second group of through holes 111b reaches the first side 11A of the substrate 11. The distance is d21, and the distance from the first terminal through hole 1111 of the second group of through holes 111b to the first side 11A of the substrate 11 is d22, wherein d21 is greater than d22, which can be used to increase the second terminal through hole of the second group of through holes 111b. The distance between the hole 1112 and the first side 11A of the substrate 11 is convenient for welding the second terminal connecting portion 241 and the second connecting member 62 . Optionally, the range of d21 greater than d22 is 2mm-4mm.

Referring to FIG. 6 and FIG. 7 , multiple sets of protrusions 12 and the base plate 11 are integrally formed by injection molding. Multiple sets of protrusions 12 are disposed on the first side 11 a of the substrate 11 at intervals along the first direction X, and the plurality of sets of protrusions 12 are respectively extended along the third direction Z on the surface of the substrate 11 . Multiple sets of gaps are formed between multiple groups of protrusions 12. Viewed along the second direction Y, the through hole 111 is located between two adjacent protrusions 12, and the through hole 111 connects the gaps. Any two adjacent protrusions 12 There is a through hole 111 between them.

When multiple battery cells 2 are stacked and arranged on the bracket 1, each group of through holes 111 corresponds to one battery cell 2, specifically, the first terminal 23 and the second terminal 24 of the same battery cell 2 respectively penetrate each The first terminal through hole 1111 and the second terminal through hole 1112 of the set of through holes 111, the first terminal 23 and the second terminal 24 and the edge sealing part 212 of the cell 2 are located between two adjacent protrusions 12 between. In some embodiments, after the first terminal 23 passes through the first terminal through hole 1111 and the second terminal 24 passes through the second terminal through hole 1112, the first terminal connecting portion 231 of the first terminal 23 and the second terminal 24 By bending the second terminal connection portion 241 , adjacent battery cells 2 can be connected in series or in parallel.

Further, in the direction opposite to the second direction Y, the width of each group of protrusions 12 in the first direction X gradually decreases, that is, the cross-sectional shape of the protrusions 12 in the third direction Z is approximately V-shaped, and V The tip of the shape faces away from the substrate 11 along the second direction Y. The width of the gap between two adjacent protrusions 12 in the first direction X is gradually reduced along the second direction Y. It can be understood that when the first terminal 23 and the second terminal 24 move into the gap between the two convex parts 12, the surface of the convex part 12 can guide the movement of the first terminal 23 and the second terminal 24, The first terminal 23 and the second terminal 24 are guided to move close to the substrate 11 until penetrating into the through hole 111 .

In some embodiments, the minimum distance between two adjacent protrusions 12 is equal to the width of the through hole 111 along the first direction X.

In one embodiment, viewed along the second direction Y, the plurality of sets of protrusions 12 includes a first set of protrusions 121 , a second set of protrusions 122 and a third set of protrusions 123 . Wherein, the first group of protrusions 121 are located between the first group of through holes 111a and the adjacent third group of through holes 111c, and the second group of protrusions 122 are located between the second group of through holes 111b and adjacent to the second group of through holes 111b. Between adjacent third groups of through holes 111 c , the third group of protrusions 123 is located between two adjacent third groups of through holes 111 c and also located between the first group of protrusions 121 and the second group of protrusions 122 .

Viewed along the second direction Y, the first group of protrusions 121 includes a first terminal through hole 1111 located between the first group of through holes 111a and the second terminal through hole 1112 of the third group of through holes 111c adjacent to it. The first portion 121a, and the second portion 121b located between the second terminal through hole 1112 of the first group of through holes 111a and the first terminal through hole 1111 of its adjacent third group of through holes 111c. Along the second direction Y, the width of the projection of the first part 121a on the substrate 11 along the first direction X is W1, and the projection of the second part 121b on the substrate 11 has a width of W2 along the first direction X, wherein W1 is greater than W2 , it is beneficial for the first terminal 23 of the first part 121a to stay away from the second terminal 24 in the adjacent third group of through holes 111c along the first direction X, increasing the distance between the first terminal 23 and the second terminal 24, and reducing the distance between the first terminal 23 and the second terminal 24. There is a risk of a short circuit between the first terminal 23 and the second terminal 24 .

When the first terminal 23 and the second terminal 24 of the same cell 2 abut against the first part 121a and the second part 121b respectively, the cell 2 moves along the second direction Y to approach the substrate 11, the first part 121a and the second The portion 121b can function as a guide to respectively guide the first terminal 23 and the second terminal 24 to move close to the substrate 11 until they penetrate into the first terminal through hole 1111 and the second terminal through hole 1112 respectively.

In one embodiment, along the first direction X, the distance from the first portion 121 a to the second group of convex portions 122 is equal to the distance from the second portion 121 b to the second group of convex portions 122 .

Viewed along the second direction Y, the second group of protrusions 122 includes a second terminal through hole 1112 located between the second group of through holes 111b and the first terminal through hole 1111 of the third group of through holes 111c adjacent thereto. and a fourth portion 122b located between the first terminal through hole 1111 of the second group of through holes 111b and the second terminal through hole 1112 of the third group of through holes 111c adjacent thereto. Along the second direction Y, the width of the projection of the third portion 122a on the substrate 11 along the first direction X is W3, and the projection of the fourth portion 122b on the substrate 11 has a width of W4 along the first direction X, wherein W3 is less than W4, during the assembly process, it is beneficial to guide the second terminal 24 located in the second terminal through hole 1112 of the second group of through holes 111b to be placed close to the adjacent third group of through holes 111c, and at the same time, the second group of through holes can be made The distance between the first terminal through hole 1111 of 111b and the adjacent third group of through holes 111c is equal to D3.

In one embodiment, the difference between D1 and D3 is equal to the difference between D3 and D2, and the distance between the first terminal through hole 1111 of the second group of through holes 111b and the adjacent third group of through holes 111c is equal to D3, The distance between the second terminal through holes 1112 of the first group of through holes 111a and the adjacent third group of through holes 111c is equal to D3. Please refer to FIG. 18, along the first direction X, the distance from the first terminal through hole 1111 of the first group of through holes 111a to the second group of through holes 111b is d1, and the distance from the second terminal through hole 1112 of the first group of through holes 111a to The distance of the second group of through holes 111b is d2, and d1 is equal to d2, which is conducive to cutting the length of the first terminal 23 extending out of the battery case 21 and the length of the second terminal 24 extending out of the battery case 21 to be the same length, which is convenient Production.

In one embodiment, the first group of protrusions 121 further includes a fifth portion 121c, and the fifth portion 121c connects the first portion 121a and the second portion 121b respectively. Along the second direction Y, the width of the projection of the fifth part 121c on the substrate 11 along the first direction X gradually increases from the end connected to the second part 121b to the end connected to the first part 121a, and the fifth part 121c deviates from One side surface of the second group of protrusions 122 is smoothly connected with the surface of the first part 121a facing away from the second group of protrusions 122, and is used to guide the partial structure of the edge sealing part 212 from the second part 121b to the first part 121a.

It can be understood that the protrusions 12 further include a fourth group of protrusions 124 and a fifth group of protrusions 125 . The fourth group of protrusions 124 are arranged at intervals along the first direction X on the side of the first group of protrusions 121 away from the third group of protrusions 123, and the second terminal through holes 1112 of the first group of through holes 111a are located on the first group of protrusions. Between 121 and the fourth group of protrusions 124 , the fourth group of protrusions 124 cooperates with the adjacent first group of protrusions 121 to form a gap to guide the second terminals 24 into groups. The fifth group of protrusions 125 are arranged at intervals along the first direction X on the side of the second group of protrusions 122 away from the third group of protrusions 123. The first terminal through hole 1111 and the second terminal through hole of the second group of through holes 111b 1112 is located between the second group of protrusions 122 and the fifth group of protrusions 125, the fifth group of protrusions 125 cooperates with the adjacent first group of protrusions 121 to form a gap, so that the first terminal 23 and the second terminal 24 group oriented. It can be understood that the sides of the fourth group of protrusions 124 and the fifth group of protrusions 125 close to the substrate 11 are located on the same plane as the side of the substrate 11 in the second direction Y.

The substrate 11 also includes a third side 11c and a fourth side 11d that are oppositely arranged along the third direction Z, and the substrate 11 also includes an opening 11e disposed on the third side 11c, between the opening 11e and the plurality of sets of convex portions 12 along the third direction. Multiple sets of gap connectivity. The first terminal 23 and the second terminal 24 enter between two adjacent sets of protrusions 12 along the third direction Z from the opening 11 e of the third side 11 c of the substrate 11 .

In one embodiment, the ends of the plurality of groups of protrusions 12 located on the third side 11c are provided with first slopes 12a and second slopes 12b, and the first slopes 12a and second slopes 12b face the gap between adjacent protrusions 12. Gap setting. Along the first direction X, the distance between the first slope 12a and the second slope 12b of the same group of convex parts 12 gradually increases from the third side 11c to the fourth side 11d, that is, the first slope 12a and its adjacent convex The distance between the second slope 12b of the portion 12 along the first direction X is gradually reduced from the third side 11c to the fourth side 11d, so that the opening 11e presents a flaring shape, which is convenient for connecting the first terminal 23 and the second side. The terminals 24 are guided into the gap between two adjacent groups of protrusions 12 , so as to improve the success rate of docking the battery cell 2 with the bracket 1 .

It can be understood that the fourth side can also be provided with an opening 11 e and a corresponding slope for guiding the first terminal 23 and the second terminal 24 into the gap between the two sets of protrusions 12 .

It can be understood that when the first terminal 23 and the second terminal 24 are plugged into the bracket 1, the first terminal 23 and the second terminal 24 first enter the adjacent two terminals from the opening 11e of the third side 11c along the third direction Z. Between the protrusions 12, the first terminal 23 and the second terminal 24 continue to move along the second direction Y. During the movement, the width in the first direction X through the gap between two adjacent protrusions 12 along the second The two directions Y are gradually reduced, and at the same time, the first terminal 23 and the second terminal 24 are guided in groups along the first direction X and the second direction Y until they move to the preset position, and then the first terminal 23 and the second terminal 24 are guided along the second direction Y. The terminal 23 is plugged into the first terminal through hole 1111 and the second terminal 24 is plugged into the second terminal through hole 1112. During the movement along the second direction Y, the outer surface of the convex part 12 connects the first terminal 23 and the second terminal through hole 1112. The position where the second terminal 24 guides the through hole 111 is beneficial to improve the success rate of plugging.

The bracket 1 also includes a partition 13, the partition 13 is located between the first terminal through hole 1111 and the second terminal through hole 1112 of the same group of through holes 111, when the first terminal 23 and the second terminal 24 of the cell 2 After passing through the first terminal through hole 1111 and the second terminal through hole 1112 respectively, the partition part 13 is located between the first terminal connecting part 231 and the second terminal connecting part 241 . It can be understood that the partition 13 can reduce the probability of other foreign matter falling between the first terminal through hole 1111 and the second terminal through hole 1112 of the same group, thereby reducing the first terminal 23 and the second terminal 24 due to the foreign matter. Risk of short circuit. Optionally, the partition 13 can also enhance the structural strength of the bracket 1 .

As shown in Fig. 9 and Fig. 10, after the first terminal 23 and the second terminal 24 pass through the through hole 111, they are respectively bent and connected together in opposite directions. By bending, multiple battery cells 2 can be connected in series or in parallel. together.

It can be understood that, along the first direction X, the first terminal 23 of one of the two outermost battery cells 2 and the second terminal 24 of the other battery cell 2 are not connected in series with the adjacent battery cells 2 , the first terminal 23 and the second terminal 24 can be used as the output terminal of the series circuit to be electrically connected to an external device.

In this application, the outer side refers to the side away from the center of the stack. The two outermost battery cells 2 refer to the two battery cells 2 at both ends of the first direction X in the stacked battery cells 2 .

As shown in FIG. 11 and FIG. 12 , the battery module 100 further includes a conductive element 4 and a sampling element 5 , and the conductive element 4 and the sampling element 5 are disposed on the second side 11 b of the substrate 11 .

Viewed in a direction opposite to the second direction Y, the conductive member 4 is disposed between the first terminal through hole 1111 and the second terminal through hole 1112 adjacently disposed along the first direction X. The first terminal connecting portion 231 , the second terminal connecting portion 241 are connected to the conductive member 4 . Along the first direction X, the length of the conductive member 4 is the same, so that the welding area of the first terminal connection portion 231, the second terminal connection portion 241 and the conductive member 4 between adjacent electric cores 2 are the same, which is beneficial to keep the electric core 2 consistency, improving the service life of the battery module 100.

When the first terminal 23 and the second terminal 24 adjacent to each other along the first direction X are bent, the second terminal 24 is located below after bending, and the second terminal 24 abuts and is electrically connected to the conductive member 4. The first terminal 23 abuts and is electrically connected to the second terminal 24 .

It can be understood that when the first terminal 23 is located below the second terminal 24 after bending, the first terminal 23 abuts and is electrically connected to the conductive member 4 , and the second terminal 24 abuts and is electrically connected to the first terminal 23 .

One end of the sampling element 5 is connected to the substrate 11 and electrically connected to all the conductive elements 4 , and the other end protrudes from the substrate 11 . The sampling part 5 electrically connects a plurality of conductive parts 4 to all the battery cells 2 so as to be able to collect and transmit the data information of the safety circuit boards on all the battery cells 2 .

In this application, the conductive part 4 and the sampling part 5 are preset on the bracket 1 and the sampling part 5 is welded on the conductive part 4, and the first terminal 23 and the second terminal 24 of the cell 2 penetrate the through hole 111 and connect with the bracket 1 are connected together, the sampling part 5 is connected to all the battery cells 2, which can improve work efficiency.

In some embodiments, sampling member 5 comprises a sampling line.

In some embodiments, the conductive member 4 includes metal material.

As shown in Figure 13 and Figure 14, the two outermost cells 2 are the first cell 81 and the second cell 82 respectively, and the second terminal 24 on the first cell 81 is not connected to the second terminal 24 of the adjacent cell 2. One terminal 23 is connected, and the first terminal 23 on the second cell 82 is not connected to the second terminal 24 of the adjacent cell 2 .

One end of the first connecting member 61 is connected to the first terminal connection portion 231 of the first terminal 23 of the first cell 81 , and the other end protrudes from the outside of the first cell 81 to the bracket 1 . One end of the second connecting member 62 is electrically connected to the second terminal connection portion 241 of the second terminal 24 of the second cell 82 , and the other end protrudes from the outside of the second cell 82 to the bracket 1 .

The end of the first connecting member 61 away from the first electric core 81 has a first connecting portion 611, the end of the second connecting member 62 away from the second electric core 82 has a second connecting portion 621, and the first connecting portion 611 and the second The connecting portion 621 protrudes from the same side of the stacked cell 2 and protrudes from the same side as the sampling piece 5 . It can be understood that the first connection part 611 , the second connection part 621 and the sampling piece 5 are led out from the same side, which is convenient for connecting external devices and improves space utilization. In other embodiments, the first connecting portion 611 and the second connecting portion 621 are disposed on different sides of the bracket 1 .

In some embodiments, the bracket 1 is further provided with a first insulating post 14 and a second insulating post 15 , and the first insulating post 14 and the second insulating post 15 are disposed on the second side 11 b of the substrate 11 .

One end of the first insulating column 14 is fixedly connected to the substrate 11 , and the other end abuts against the first connecting member 61 , and the first connecting member 61 is electrically connected to the bent first terminal 23 , thereby reducing the possibility of short circuit. In some embodiments, the number of the first insulating pillars 14 is plural, and the plurality of first insulating pillars 14 are evenly distributed on the surface of the substrate 11 . It can be understood that the plurality of first insulating pillars 14 can better support the first connecting member 61 and reduce the possibility of short circuit occurring when the first connecting member 61 contacts the bent first terminal 23 and the second terminal 24 .

One end of the second insulating column 15 is fixedly connected to the substrate 11 , and the other end abuts against the side and bottom of the first connecting member 61 . The second insulating column 15 has a supporting surface and an abutting surface, the supporting surface abuts against the side of the first connecting member 61 close to the substrate 11 , and the abutting surface abuts against the side of the first connecting member 61 . In some embodiments, the number of the second insulating columns 15 is plural, and the plurality of second insulating columns 15 are respectively disposed on both sides of the first connecting member 61 along the second direction Y. It can be understood that the plurality of second insulating posts 15 can not only support the first connector 61, reduce the risk of short circuit between the first connector 61 and the bent first terminal 23 and second terminal 24, but also limit the The role of the position limits the displacement of the first connecting member 61 along the second direction Y.

The bracket 1 is further provided with an insulating block 16 disposed on the second side 11b of the substrate 11 and located between the first terminal through hole 1111 of the first group of through holes 111a and the adjacent third group of through holes 111c. The length of the insulating block 16 along the third direction Z is greater than the length of the through holes 111 on both sides of the insulating block 16 along the third direction Z, and the insulating block 16 is protruded on the substrate 11 along the second direction Y for carrying the first connection 61, and block the first connecting piece 61 and the first terminal 23 welded on the first connecting piece 61 and the adjacent second terminal 24, reduce the contact between the first connecting piece 61 and the third group of through holes 111c Risk of short circuit of the second terminal 24 .

In some embodiments, the first connecting member 61 and the second connecting member 62 are made of metal.

In some embodiments, the first insulating pillar 14 and the second insulating pillar 15 are made of insulating material.

Please continue to refer to FIG. 1 and FIG. 2 , the battery module 100 further includes a first filler 71 and a second filler 72 .

The first filler 71 is filled between the two opposite first surfaces 2111 , and both ends of the first filler 71 abut against the two first surfaces 2111 respectively. It can be understood that the first filler 71 can restrict the two opposite first surfaces 2111 from abutting together, thereby reducing the risk of short circuit of the two battery cells 2 where the two first surfaces 2111 are located.

The second filler 72 is disposed between the casing 3 and the stacked battery cells 2 . It can be understood that the second filler 72 can reduce the risk of shaking of the battery cells 2 inside the packaged battery module 100 .

In some embodiments, the first filler 71 and the second filler 72 are foam.

In some embodiments, the second housing 32 is provided with a third through hole 321 , a fourth through hole 322 and a fifth through hole 323 . The third through hole 321 corresponds to the first connection portion 611, the fourth through hole 322 corresponds to the second connection portion 621, and the third through hole 321 and the fourth through hole 322 can respectively allow the first connection portion 611 and the second connection. Section 621 passes through. The fifth through hole 323 corresponds to the sampling piece 5 , and the fifth through hole 323 can allow the sampling piece 5 to pass through.

The first connection part 611, the second connection part 621 and the sampling piece 5 protrude from the second housing 32 through the third through hole 321, the fourth through hole 322 and the fifth through hole 323 respectively, so as to be able to connect external equipment, and the The electric energy of the stacked cell 2 and the digital information on the safety circuit boards of all the cells 2 are transmitted.

Please refer to FIG. 11. In this embodiment, there are an even number of batteries 2, and the first terminal through holes 1111 of the first group of through holes 111a and the second terminal through holes 1112 of the second group of terminal holes 111b are along the first direction. X is arranged opposite to each other, along the first direction X, the projection of the first terminal through hole 1111 and the projection of the second terminal through hole 1112 at least partially overlap. Please refer to FIG. 18. In other embodiments, the plurality of electric cores 2 is an odd number, and the first terminal through holes 1111 of the first group of through holes 111a and the first terminal through holes 1111 of the second group of terminal holes 111b are along the first The direction X is set relative to.

Please refer to FIG. 11. In this embodiment, a plurality of battery cells 20 are connected in series, and between adjacent groups of through holes 111c, the first terminal through holes 1111 and the second terminal through holes 1112 are opposite to each other along the first direction X. It is set that, along the first direction X, the projection of the first terminal through hole 1111 and the projection of the second terminal through hole 1112 at least partially overlap.

In other embodiments, the first terminal through holes 1111 and the second terminal through holes 1112 can be arranged separately along the first direction X between adjacent groups of through holes 111c. Along the first direction X, the projection of the first terminal through-hole 1111 and the projection of the second terminal through-hole 1112 may be arranged apart from each other.

Please refer to FIG. 15 , the present application also provides an electric device 200 using the above-mentioned battery module 100 , which can be used after being connected to the battery module 100 through a line. In one embodiment, the electrical device 200 of the present application may be, but not limited to, a pen input computer, a mobile computer, a portable fax machine, a portable copier, a portable printer, a stereo headphone, a video recorder, an LCD TV, a portable Cleaners, transceivers, electronic notebooks, calculators, backup power supplies, motors, electric vehicles, motorcycles, electric assisted bicycles, electric tools, large batteries for household use, etc.

To sum up, the battery module 100 and the electrical equipment 200 of the present application guide the first terminal 23 and the second terminal 24 from the side to between two adjacent protrusions 12 along the third direction Z, and then The width of the gap between two adjacent protrusions 12 in the first direction X is gradually reduced along the second direction Y, and the first terminal 23 and the second terminal 24 are continuously guided along the first direction X and the second direction Y Insert the through hole 111 to improve the assembly efficiency; the ends of the multiple groups of convex parts 12 are provided with a first slope 12a and a second slope 12b, and the distance between the first slope 12a and the second slope 12b along the first direction X is determined by the first slope 12a and the second slope 12b. The three sides 11c gradually increase toward the fourth side 11d, which is convenient for guiding the first terminal 23 and the second terminal 24 into the gap between the adjacent two sets of protrusions 12, and improving the success rate of docking the battery cell 2 with the bracket 1; The convex part 12 is located between the adjacent first terminal 23 and the second terminal 24, and can play a role of isolation. By enlarging the first terminal through hole 1111 of the first group of through holes 111a and its adjacent third group of through holes The distance between the second terminal through holes 1112 of the hole 111c increases the distance between the first terminal connection part 231 connected to the first connector 61 and the adjacent second terminal connection part 241, which can reduce the distance between the first terminal connection part 241 and the second terminal connection part 241. There is a risk of short circuit between the connecting portion 231 and the second terminal connecting portion 241 due to too small a distance.

In addition, those skilled in the art can also make other changes within the spirit of the present application. Of course, these changes made according to the spirit of the present application should be included in the scope disclosed in the present application.

Claims (20)

1. A battery module, comprising:

a plurality of battery cells stacked along a first direction, each battery cell including a first terminal and a second terminal, the first terminal and the second terminal being opposite in polarity;

a bracket including a plurality of groups of through holes, each group of through holes including a first terminal through hole and a second terminal through hole, the first terminal and the second terminal of the same battery core respectively pass through the first terminal through hole and the second terminal through hole of the same group,

wherein the plurality of groups of through holes comprise a first group of through holes, a second group of through holes and a plurality of groups of third group of through holes positioned between the first group of through holes and the second group of through holes, wherein a distance D1 between a first terminal through hole of the first group of through holes and a second terminal through hole of the third group of through holes adjacent to the first terminal through hole is larger than a distance D3 between the adjacent third group of through holes along the first direction;

the battery module further includes a first connection member connected to a first terminal of a first terminal through-hole passing through the first group of through-holes.

2. The battery module according to claim 1, wherein, of the adjacent two third-group through-holes, the first terminal through-hole of one of the third-group through-holes and the second terminal through-hole of the other of the third-group through-holes are at a distance D3, and wherein the first terminal through-hole of one of the third-group through-holes and the second terminal through-hole of the other of the third-group through-holes are disposed opposite to each other in the first direction.

3. The battery module of claim 1, wherein the difference between D1 and D3 is greater than 6mm.

4. The battery module of claim 1, wherein a distance between a second terminal through hole of the second set of through holes and a first terminal through hole of the third set of through holes adjacent thereto is D2, wherein the D2 is smaller than the D3.

5. The battery module of claim 1, wherein a distance d1 from a first terminal through hole of the first set of through holes to a second terminal through hole of the second set of through holes is equal to a distance d2 from a second terminal through hole of the first set of through holes to a first terminal through hole of the second set of through holes in the first direction.

6. The battery module of claim 1, wherein the bracket further comprises a base plate and a plurality of sets of spaced apart protrusions, the base plate comprising a first side and a second side disposed opposite one another in a second direction, the plurality of sets of protrusions being located on the first side of the base plate,

The plurality of sets of projections including, as viewed in the second direction, a first set of projections between the first set of through holes and the third set of through holes adjacent thereto, a second set of projections between the second set of through holes and the third set of through holes adjacent thereto, and a third set of projections between the first set of projections and the second set of projections, the first set of projections including a first portion between the first terminal through holes of the first set of through holes and the second terminal through holes of the third set of through holes adjacent thereto, and a second portion between the second terminal through holes of the first set of through holes and the first terminal through holes of the third set of through holes adjacent thereto;

along the second direction, a width of a projection of the first portion on the substrate along the first direction is W1, and a width of a projection of the second portion on the substrate along the first direction is W2, wherein W1 is greater than W2.

7. The battery module of claim 6, wherein a distance from the first portion to the second set of protrusions is equal to a distance from the second portion to the second set of protrusions in the first direction.

8. The battery module of claim 6, wherein each set of protrusions tapers in a direction opposite the second direction.

9. The battery module of claim 6, wherein the second set of protrusions includes a third portion between the second terminal through-holes of the second set of through-holes and the first terminal through-holes of the third set of through-holes adjacent thereto, and a fourth portion between the first terminal through-holes of the second set of through-holes and the second terminal through-holes of the third set of through-holes adjacent thereto, as viewed in the second direction,

along the second direction, a width of a projection of the third portion on the substrate along the first direction is W3, a width of a projection of the fourth portion on the substrate along the first direction is W4, and W3 is smaller than W4.

10. The battery module of claim 6, wherein the substrate includes a second side and a first side along the first direction, a distance from a second terminal via of the second set of vias to the first side is d21, a distance from a first terminal via of the second set of vias to the first side is d22, and the d21 is greater than the d22.

11. The battery module of claim 6, wherein the substrate includes a second side and a first side in the first direction, the first terminal through-holes of the first set of through-holes penetrating the second side on a side of the first set of through-holes remote from the second set of through-holes.

12. The battery module according to claim 6, wherein the bracket includes a third side and a fourth side disposed opposite to each other in a third direction, the bracket includes an opening disposed at the third side, a plurality of sets of gaps are formed between the plurality of sets of protrusions, and the opening communicates with the plurality of sets of gaps in the third direction.

13. The battery module according to claim 12, wherein the end portions of the plurality of sets of convex portions located at the third side are provided with a first inclined surface and a second inclined surface, and the distances between the first inclined surfaces and the second inclined surfaces of the same set of convex portions in the third direction are gradually increased in the first direction.

14. The battery module of claim 1, wherein the cells further comprise:

a battery cell housing including a receiving portion and a sealing portion extending outwardly from the receiving portion, the receiving portion including a first face and a second face disposed opposite in the first direction;

The first terminal and the second terminal extend out of the battery cell shell from the edge sealing part;

and an electrode assembly accommodated in the accommodation portion, the first terminal and the second terminal being electrically connected to the electrode assembly.

15. The battery module of claim 14, wherein the edge sealing portion is disposed between a plane in which the first face is disposed and a plane in which the second face is disposed, and the edge sealing portion is closer to the first face.

16. The battery module according to claim 6, wherein the first terminal and the second terminal connected to each other are connected together by being bent toward each other, the first terminal including a first terminal connecting portion passing through the first terminal through-hole, and the second terminal including a second terminal connecting portion passing through the second terminal through-hole;

the battery module further comprises a plurality of conductive pieces, and the plurality of conductive pieces are arranged on one side of the substrate, which is away from the convex part;

the first terminal connecting part, the second terminal connecting part and the conductive piece are connected;

the bracket further includes a partition portion located on the first side of the substrate, the partition portion being located between the first terminal through holes and the second terminal through holes of the same group of through holes.

17. The battery module of claim 16, further comprising a sampling member disposed on a side of the substrate facing away from the protrusion and connected to the conductive member.

18. The battery module of claim 12, wherein the first connection member has a first connection portion;

the battery module further includes:

and one end of the second connecting piece is connected with a second terminal penetrating through a second terminal through hole of the second group of through holes, the other end of the second connecting piece is provided with a second connecting part, and the first connecting part and the second connecting part are positioned on the same side of the substrate.

19. The battery module of claim 18, wherein the bracket further comprises an insulating block disposed on the second side of the substrate and between the first terminal through-holes of the first set of through-holes and the adjacent third set of through-holes, the insulating block having a length along the third direction that is greater than a length of the first terminal through-holes of the first set of through-holes.

20. A powered device comprising a battery module according to any one of claims 1 to 19.

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